Here are some pieces of working code. I assume you want the second one or the third one that is functionally the same but all in one statement. I do not understand why it is a factor, but I will assume that there is a current and future reason for that. This means I cannot alter the string_data variable, or you can simplify by not making the variable a factor only to turn it back into character.
mydf <- data.frame(id_station = 1234, string_data = c(2024, 12, 1, 0, 0), rainfall_value= 55) mydf$string_data <- as.factor(mydf$string_data) mydf <- data.frame(id_station = 1234, string_data = "2024, 12, 1, 0, 0", rainfall_value= 55) mydf$string_data <- as.factor(mydf$string_data) mydf <- data.frame(id_station = 1234, string_data = as.factor("2024, 12, 1, 0, 0"), rainfall_value= 55) mydf <- data.frame(id_station = 1234, string_data = as.factor("2024, 12, 1, 0, 0"), rainfall_value= 55) mydf$string_data2 <- as.character(mydf$string_data) #I assume there are many records in the data frame and your example is for demonstration only. #I cannot assume that all records are the same, though you may be able to simplify if that is true. #Split the string based on commas. split_values <- strsplit(mydf$string_data2, ",") # find the maximum string length max_length <- max(lengths(split_values)) # Add new variables to the data frame for (i in 1:max_length) { new_var_name <- paste0("VAR_", i) mydf[[new_var_name]] <- sapply(split_values, function(x) ifelse(length(x) >= i, x[i], NA)) } # Convert to numeric for (i in 1:max_length) { new_var_name <- paste0("VAR_", i) mydf[[new_var_name]] <- as.numeric(mydf[[new_var_name]]) } # remove trash mydf <- mydf[,-4] # Provide more useful names colnames(mydf) <- c("id_station", "string_data", "rainfall_mm", "Year", "Month", "Day", "hour", "minute") Regards, Tim -----Original Message----- From: R-help <r-help-boun...@r-project.org> On Behalf Of Stefano Sofia Sent: Thursday, March 28, 2024 7:48 AM To: Fabio D'Agostino <dagostinof...@gmail.com>; r-help@R-project.org Subject: Re: [R] split a factor into single elements [External Email] Sorry for my hurry. The correct reproducible code is different from the initial one. The correct example is mydf <- data.frame(id_station = 1234, string_data = as.factor(2024, 12, 1, 0, 0), rainfall_value= 55) In this case mydf$string_data is a factor, but of length 1 (and not 5 like in the initial example). Therefore the suggestion offered by Fabio does not work. Any suggestion? Sorry again for my mistake Stefano (oo) --oOO--( )--OOo-------------------------------------- Stefano Sofia PhD Civil Protection - Marche Region - Italy Meteo Section Snow Section Via del Colle Ameno 5 60126 Torrette di Ancona, Ancona (AN) Uff: +39 071 806 7743 E-mail: stefano.so...@regione.marche.it ---Oo---------oO---------------------------------------- ________________________________ Da: Fabio D'Agostino <dagostinof...@gmail.com> Inviato: gioved 28 marzo 2024 12:20 A: Stefano Sofia; r-help@R-project.org Oggetto: Re: [R] split a factor into single elements Non si ricevono spesso messaggi di posta elettronica da dagostinof...@gmail.com. Informazioni sul perch importante<https://aka.ms/LearnAboutSenderIdentification> Hi Stefano, maybe something like this can help you? myfactor <- as.factor(c(2024, 2, 1, 0, 0)) # Convert factor values to integers first_element <- as.integer(as.character(myfactor)[1]) second_element <- as.integer(as.character(myfactor)[2]) third_element <- as.integer(as.character(myfactor)[3]) # Print the results first_element [1] 2024 second_element [1] 2 third_element [1] 1 # Check the type of the object typeof(first_element) [1] "integer" Fabio Il giorno gio 28 mar 2024 alle ore 11:29 Stefano Sofia <stefano.so...@regione.marche.it<mailto:stefano.so...@regione.marche.it>> ha scritto: Dear R-list users, forgive me for this silly question, I did my best to find a solution with no success. Suppose I have a factor type like myfactor <- as.factor(2024, 2, 1, 0, 0) There are no characters (and therefore strsplit for eample does not work). I need to store separately the 1st, 2nd and 3rd elements as integers. How can I do? Thank you for your help Stefano (oo) --oOO--( )--OOo-------------------------------------- Stefano Sofia PhD Civil Protection - Marche Region - Italy Meteo Section Snow Section Via del Colle Ameno 5 60126 Torrette di Ancona, Ancona (AN) Uff: +39 071 806 7743 E-mail: stefano.so...@regione.marche.it<mailto:stefano.so...@regione.marche.it> ---Oo---------oO---------------------------------------- ________________________________ AVVISO IMPORTANTE: Questo messaggio di posta elettronica pu contenere informazioni confidenziali, pertanto destinato solo a persone autorizzate alla ricezione. I messaggi di posta elettronica per i client di Regione Marche possono contenere informazioni confidenziali e con privilegi legali. Se non si il destinatario specificato, non leggere, copiare, inoltrare o archiviare questo messaggio. Se si ricevuto questo messaggio per errore, inoltrarlo al mittente ed eliminarlo completamente dal sistema del proprio computer. Ai sensi dell'art. 6 della DGR n. 1394/2008 si segnala che, in caso di necessit ed urgenza, la risposta al presente messaggio di posta elettronica pu essere visionata da persone estranee al destinatario. IMPORTANT NOTICE: This e-mail message is intended to be received only by persons entitled to receive the confidential information it may contain. E-mail messages to clients of Regione Marche may contain information that is confidential and legally privileged. Please do not read, copy, forward, or store this message unless you are an intended recipient of it. If you have received this message in error, please forward it to the sender and delete it completely from your computer system. 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[[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.